My Attempt at Painting

I've been enjoying playing around with oil paints. I haven't taken any classes or anything; I'm just having fun. This is my latest stab at it. I actually got a book for Christmas The Complete Oil Painter and I need to take the time and read it and practice more, as I know nothing about technique yet. I really want to learn shadows and highlights to work on depth. Everything I do seems so flat. The fun part is practicing though. :)